The tailfin is part of the aircraft, and should not be ignored. But it has limited 'weight' in the picture because of its small area. If the tailfin extended forward to the nose, making the aircraft shape a square, #2 would be OK.

Peter

The only difference between me and a madman is that I am not mad (Salvador Dali)

In this case, yes, the first one looks good. That's because it's nice to show a bit of the ground. If it was all sky it would be slightly high in the frame for me. Certainly, centering the fuselage/window line doesn't always work.

The only difference between me and a madman is that I am not mad (Salvador Dali)